*{margin:0;padding:0}
html{
	font-size: 62.5%;
}
li{
	list-style: none;font-size: 1.5rem;;
}
a{
	text-decoration: none;color:black;
}
.zhu{
	width:100%;height:5rem;background:#DEDEDE;align-items: center;
	position:fixed;display: flex;justify-content: space-between;
	bottom: 0px;left:0px
}
